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In an experiment, the height of several plants was recorded daily in millimeters. Which tool would be the most accurate and appropriate for this measurement?
Metric ruler
How happy is a chimpanzee when it finds its favorite food?
Soil
Temperature
Control groups allow comparison between subjects receiving a treatment and those receiving no treatment.
The percentage of humidity
The accuracy of making and recording measurements
Test tubes, thermometers, and graphs of results
A biology class of 24 students decides to measure the height of each student and then calculate the average height for the class. Which of these is a possible source of error in this activity?
Metric ruler
How happy is a chimpanzee when it finds its favorite food?
Soil
Temperature
Control groups allow comparison between subjects receiving a treatment and those receiving no treatment.
The percentage of humidity
The accuracy of making and recording measurements
Test tubes, thermometers, and graphs of results
A student wanted to study the effect of temperature on algae levels in a local stream. Which items are most useful for gathering data and most appropriate for communicating the results of her observations?
Metric ruler
How happy is a chimpanzee when it finds its favorite food?
Soil
Temperature
Control groups allow comparison between subjects receiving a treatment and those receiving no treatment.
The percentage of humidity
The accuracy of making and recording measurements
Test tubes, thermometers, and graphs of results
Which sentence best states the importance of using control groups?
Metric ruler
How happy is a chimpanzee when it finds its favorite food?
Soil
Temperature
Control groups allow comparison between subjects receiving a treatment and those receiving no treatment.
The percentage of humidity
The accuracy of making and recording measurements
Test tubes, thermometers, and graphs of results
Orchids were studied to determine if the amount of humidity affected the flowering of these plants. Which of these was the independent variable in this study?
Metric ruler
How happy is a chimpanzee when it finds its favorite food?
Soil
Temperature
Control groups allow comparison between subjects receiving a treatment and those receiving no treatment.
The percentage of humidity
The accuracy of making and recording measurements
Test tubes, thermometers, and graphs of results
A scientist designed an experiment to test the effect of temperature on bacterial growth. He grew three different cultures of the bacterium E. coli under three heat lamps at different temperatures. What was the independent variable in this experiment
Metric ruler
How happy is a chimpanzee when it finds its favorite food?
Soil
Temperature
Control groups allow comparison between subjects receiving a treatment and those receiving no treatment.
The percentage of humidity
The accuracy of making and recording measurements
Test tubes, thermometers, and graphs of results
Which question cannot be answered scientifically because the quantity cannot actually be measured?
Metric ruler
How happy is a chimpanzee when it finds its favorite food?
Soil
Temperature
Control groups allow comparison between subjects receiving a treatment and those receiving no treatment.
The percentage of humidity
The accuracy of making and recording measurements
Test tubes, thermometers, and graphs of results
A student wanted to look at plant growth in five different soil samples. He planted the same type of seeds under identical conditions and charged their growth. What is the IV in this experiment?
Metric ruler
How happy is a chimpanzee when it finds its favorite food?
Soil
Temperature
Control groups allow comparison between subjects receiving a treatment and those receiving no treatment.
The percentage of humidity
The accuracy of making and recording measurements
Test tubes, thermometers, and graphs of results
Check it!